The circumference is not 15, it's actually 11.5. I purchased these with hopes of a perfect fit (I have large calves) and was disappointed. They are really nice in person also. Will keep trying.

I love my Miidori boots. They are substantial enough to keep my feet and legs warm yet light and and flexible. The black leather is soft and has a nice subtle sheen to it. I wear a size 6 so I considered exchanging them for a 5.5 because when i tried them for the first time they felt all around quite large, but particularly too much vertical space. I did a lot of walking around that evening and found my feet quickly becoming tired because of all the extra space. Perhaps the sole is a bit too stiff as well... I decided to try them with my superfeet insoles that i use in my running shoes and since this, I have hardly gone a day without wearing my Miidoris. I take my dog on long walks while wearing them and I no longer experience the tiredness I felt wearing them without the superfeet insoles. It seems that the insoles took care of all the extra space that was causing my feet to get knocked around in there. Style-wise I would definitely recommend them; I get compliments on them all the time, but comfort-wise particularly if you have thin feet i would highly suggest pairing them with a pair of Superfeet insoles. Kudos to Zappos for the prompt shipment! I selected the standard shipping method the morning that i placed my order and on the following afternoon the Zappos package was already waiting at my doorstep.

These boots are gorgeous! Really soft, amazing leather. They fit pretty true to size. I usually wear a 6.5 or 7 and the 7 is what worked best in these because I can wear socks with them.

I get tons of compliments on these, great with leggings or skinnies. Soft leather.

I wear these boots all the time. They're very comfortable and I'm tall and I love that they're a comfortable low heel. The quilted lining in the shaft really keeps your legs and ankle warm. I wish they lining extended into the good area, though. Also, they are very tall boots. I'm 5'9 1/2 and these come all the way to my knee. Probably a little taller than I would have liked, because I can't wear boot socks with them, but I still like them enough. Get compliments all the time!